John Doe appears as an undercover cop in the missions of Campaign mode.
Players will automatically take on the role of this character if they play Campaign.
- Even if the player chooses any available character, the character icon still shows John Doe.
- At the end of the first mission in Campaign mode, Leet finds out the true identity of John Doe and presumably kills him. However, he survives the shot and appears in other missions.
- "John Doe" refers to an unnamed male. In this scenario, players assume the identity of one.